A method of rust dyeing of textiles

Abstract

This invention belongs to the textile field, and specifically relates to a method for dyeing textiles with rust. The method uses ferrous glycinate as a raw material, taking advantage of its easy solubility in water and slow hydrolysis rate. It is uniformly adsorbed onto the textile, and by changing the conditions, it is deposited in situ on the textile to form a colored precipitate, thereby imparting a uniform color to the textile. This method is highly operable and produces dyed fabrics with good colorfastness.

Description

Technical Field

[0001] This invention belongs to the field of textiles, and specifically relates to a method for dyeing textiles with rust. Background Technology

[0002] Rust dyeing of textiles is an ancient and traditional handicraft. The dyeing process involves contacting discarded iron plates, nails, wires, etc., with the textiles. The iron undergoes a chemical reaction in the presence of air and water, forming a mottled rust pattern on the textiles. Due to different process conditions and varying degrees of iron corrosion, the rust patterns on the fabric will exhibit different shades and rich variations.

[0003] When using iron plates, nails, and wires as iron sources in textile dyeing, their shapes make it difficult to achieve a uniform color on the textiles. Ferrous sulfate and ferrous sulfate can also be used as raw materials for rust dyeing, but these iron salts hydrolyze too quickly in aqueous solutions, easily forming precipitates, thus also making it difficult to achieve a uniform color on textiles. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a method for dyeing textiles with rust. The method uses ferrous glycinate as a raw material. First, ferrous glycinate is uniformly adsorbed onto the textile. Then, hydrogen peroxide and sodium hydroxide are added to react with the ferrous glycinate adsorbed on the textile to form a colored precipitate, thereby giving the textile a uniform color.

[0005] The method for dyeing textiles with rust provided by this invention includes the following steps:

[0006] Prepare 100 mL of ferrous glycine solution and add it to the pretreated bleached cotton fabric at a liquor ratio of 20-30:1. Adsorb at 30-60℃ for 30-60 min. After adsorption, add 3.0-5.0 mL of H2O2 solution dropwise while stirring. After 15-30 min, continue to add 5.0-10.0 mL of NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1-2 h. After the incubation period, remove the fabric, wash it 3-5 times with deionized water, and then dry it at 60-100℃.

[0007] The concentration of the ferrous glycine solution was 0.03-0.06 mol / L.

[0008] The concentration of H2O2 solution is 1-10 mol / L.

[0009] The concentration of NaOH solution is 2.5-4.0 g / L.

[0010] Beneficial effects: This invention uses ferrous glycinate as a raw material and takes advantage of its non-hydrolyzable properties to make it uniformly adsorbed on textiles. Then, it forms a colored precipitate in situ, which improves the uniformity of the colored textiles. Attached image description:

[0011] Figure 1 Photograph of dyed fabric in Example 1.

[0012] Figure 2 Photograph of dyed fabric in Comparative Example 1-1. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to specific embodiments. It should be understood that these embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention in any way.

[0014] Example 1

[0015] Prepare 100 mL of 0.03 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 20:1. Adsorb at 30℃ for 60 min. After adsorption, add 5.0 mL of 1 mol / L H2O2 solution dropwise while stirring. After 15 min, add 10.0 mL of 2.5 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1 h. After the incubation period, remove the fabric, wash it three times with deionized water, and then dry it at 60℃.

[0016] Comparative Example 1-1

[0017] Prepare 100 mL of 0.03 mol / L ferrous sulfate solution and add it to the pretreated bleached fabric at a liquor ratio of 20:1. Adsorb at 30℃ for 60 min. After adsorption, add 5.0 mL of 1 mol / L H2O2 solution dropwise while stirring. After 15 min, add 10.0 mL of 2.5 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1 h. After the incubation period, remove the fabric, wash it three times with deionized water, and then dry it at 60℃.

[0018] Comparative Examples 1-2

[0019] Prepare 100 mL of 0.02 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 20:1. Adsorb at 30℃ for 60 min. After adsorption, add 5.0 mL of 1 mol / L H2O2 solution dropwise while stirring. After 15 min, add 10.0 mL of 2.5 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1 h. After the incubation period, remove the fabric, wash it three times with deionized water, and then dry it at 60℃.

[0020] Comparative Examples 1-3

[0021] Prepare 100 mL of 0.03 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 20:1. Adsorb at 25℃ for 60 min. After adsorption, add 5.0 mL of 1 mol / L H2O2 solution dropwise while stirring. After 15 min, add 10.0 mL of 2.5 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1 h. After the incubation period, remove the fabric, wash it three times with deionized water, and then dry it at 60℃.

[0022] Comparative Examples 1-4

[0023] Prepare 100 mL of 0.03 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 20:1. Adsorb at 30℃ for 70 min. After adsorption, add 5.0 mL of 1 mol / L H2O2 solution dropwise while stirring. After 15 min, add 10.0 mL of 2.5 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1 h. After the incubation period, remove the fabric, wash it three times with deionized water, and then dry it at 60℃.

[0024] Comparative Examples 1-5

[0025] Prepare 100 mL of 0.03 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 20:1. Adsorb at 30℃ for 60 min. After adsorption, add 5.0 mL of 0.5 mol / L H2O2 solution dropwise while stirring. After 15 min, add 10.0 mL of 2.5 g / L NaOH solution dropwise. After the addition is complete, keep warm for 1 h. After the warming is complete, take out the fabric, wash it three times with deionized water, and dry it at 60℃.

[0026] Comparative Examples 1-6

[0027] Prepare 100 mL of 0.03 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 20:1. Adsorb at 30℃ for 60 min. After adsorption, add 5.0 mL of 1 mol / L H2O2 solution dropwise while stirring. After 15 min, add 10.0 mL of 2.0 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1 h. After the incubation period, remove the fabric, wash it three times with deionized water, and then dry it at 60℃.

[0028] Example 2

[0029] Prepare 100 mL of 0.06 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 30:1. Adsorb at 60℃ for 30 min. After adsorption, add 3.0 mL of 10 mol / L H2O2 solution dropwise with stirring. After 30 min, add 5.0 mL of 4.0 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 2 h. After the incubation period, remove the fabric, wash it 5 times with deionized water, and then dry it at 100℃.

[0030] Comparative Example 2-1

[0031] Prepare 100 mL of 0.07 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 30:1. Adsorb at 60℃ for 30 min. After adsorption, add 3.0 mL of 10 mol / L H2O2 solution dropwise while stirring. After 30 min, add 5.0 mL of 4.0 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 2 h. After the incubation period, remove the fabric, wash it 5 times with deionized water, and then dry it at 100℃.

[0032] Comparative Example 2-2

[0033] Prepare 100 mL of 0.06 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 30:1. Adsorb at 70℃ for 30 min. After adsorption, add 3.0 mL of 10 mol / L H2O2 solution dropwise while stirring. After 30 min, add 5.0 mL of 4.0 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 2 h. After the incubation period, remove the fabric, wash it 5 times with deionized water, and then dry it at 100℃.

[0034] Comparative Examples 2-3

[0035] Prepare 100 mL of 0.06 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 30:1. Adsorb at 60℃ for 20 min. After adsorption, add 3.0 mL of 10 mol / L H2O2 solution dropwise while stirring. After 30 min, add 5.0 mL of 4.0 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 2 h. After the incubation period, remove the fabric, wash it 5 times with deionized water, and then dry it at 100℃.

[0036] Comparative Examples 2-4

[0037] Prepare 100 mL of 0.06 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 30:1. Adsorb at 60℃ for 30 min. After adsorption, add 3.0 mL of 11 mol / L H2O2 solution dropwise while stirring. After 30 min, add 5.0 mL of 4.0 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 2 h. After the incubation period, remove the fabric, wash it 5 times with deionized water, and then dry it at 100℃.

[0038] Comparative Examples 2-5

[0039] Prepare 100 mL of 0.06 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 30:1. Adsorb at 60℃ for 30 min. After adsorption, add 3.0 mL of 10 mol / L H2O2 solution dropwise while stirring. After 30 min, add 5.0 mL of 4.5 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 2 h. After the incubation period, remove the fabric, wash it 5 times with deionized water, and then dry it at 100℃.

[0040] Example 3

[0041] Prepare 100 mL of 0.04 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 25:1. Adsorb at 40℃ for 40 min. After adsorption, add 4.0 mL of 5 mol / L H2O2 solution dropwise with stirring. After 20 min, add 6.0 mL of 3.0 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1.5 h. After the incubation period, remove the fabric, wash it four times with deionized water, and then dry it at 70℃.

[0042] Example 4

[0043] Prepare 100 mL of 0.05 mol / L ferrous glycine solution and add it to the pretreated bleached fabric at a liquor ratio of 22:1. Adsorb at 50℃ for 50 min. After adsorption, add 4.5 mL of 8 mol / L H2O2 solution dropwise with stirring. After 25 min, add 8.0 mL of 3.5 g / L NaOH solution dropwise. After the addition is complete, keep the fabric at this temperature for 1.2 h. After the incubation period, remove the fabric, wash it three times with deionized water, and then dry it at 80℃.

[0044] Example 5

[0045] Color parameter test: The dyed fabric was folded three times and the L color of the dyed fabric was measured using a Datacolor colorimeter under D65 light source and 10° observation angle conditions. * a * b *The K / S value was calculated by testing each sample at different locations four times and taking the average value.

[0046] Color fastness test: Color fastness to rubbing is determined according to the method specified in GB / T 3920-2008; Color fastness to washing is determined according to the method specified in GB / T 3921-2008.

[0047] Surface color uniformity test: After dyeing, randomly select 8 points on the same piece of fabric and measure the K / S value at the maximum absorption wavelength. Calculate the standard deviation S using the following formula:

[0048]

[0049] In the formula: n is the number of measurement points.

[0050] The smaller the S value, the better the color uniformity.

[0051] The test results are as follows:

[0052] Table 1 Color fastness of dyed fabrics

[0053]

[0054] As shown in Table 1, the dyed fabrics obtained by this invention have deep color, good evenness, and excellent color fastness. Comparative Example 1-1 used ferrous sulfate as a raw material. Because ferrous sulfate is easily hydrolyzed in solution, forming precipitates and losing its dyeing ability on textiles, and these precipitates easily form color spots on the textiles, the fabric obtained in Comparative Example 1-1 had a lower K / S value, poor dyeing evenness (high S value), and lower color fastness than the embodiments of this invention. When the concentration of ferrous glycinate was too low (Comparative Example 1-2), the dyed fabric was light in color; when the concentration of ferrous glycinate was too high (Comparative Example 2-1), the K / S value of the dyed fabric increased slightly, but the dyeing evenness deteriorated. When the adsorption temperature was too low (Comparative Example 1-3), the adsorption rate of ferrous glycinate on the fabric was slow, resulting in a light color; however, when the adsorption temperature was too high (Comparative Example 2-2), it easily led to uneven dyeing. Once all the ferrous glycinate in the solution is adsorbed by the textiles, extending the adsorption time further (Comparative Examples 1-4) has little effect on the K / S value of the dyed fabric; however, if the adsorption time is too short (Comparative Examples 2-3), the dyed fabric will be light in color. If the concentrations of H2O2 solution and NaOH solution are too low (Comparative Examples 1-5, 1-6), the ferrous glycinate adsorbed on the textiles will not be fully converted, resulting in a light color in the dyed fabric; however, if the concentrations of H2O2 solution and NaOH solution are too high (Comparative Examples 2-4, 2-5), it will have little effect on the K / S value of the dyed fabric and will lead to a decrease in dyeing uniformity.

Claims

1. A method of rust dyeing a textile, characterized by: The method first uniformly adsorbs glycine ferrous on the textile, then adds hydrogen peroxide and sodium hydroxide to react with it to form colored precipitate, realizing uniform coloring of the textile; The method is as follows: preparing a glycine ferrous solution, adding the pretreated bleached cotton fabric to adsorb, bath ratio 20-30:1, after adsorption, under stirring, dropwise adding H2O2 solution, after 15-30 min, continuously dropwise adding NaOH solution, after dropwise adding, keeping warm for 1-2 h, after keeping warm, taking out the fabric, washing with deionized water for 3-5 times, and drying at 60-100 DEG C, and then the product is obtained. The concentration of the glycine ferrous solution is 0.03-0.06 mol / L.

2. The method of rust dyeing a textile according to claim 1, characterized in that: The adsorption temperature is 30-60 DEG C, and the adsorption time is 30-60 min.

3. The method of rust dyeing a textile according to claim 1, wherein: The concentration of the H2O2 solution is 1-10 mol / L, and the dropwise adding amount of the H2O2 solution is 3.0-5.0 mL.

4. The method of rust dyeing a textile according to claim 1, wherein: The concentration of the NaOH solution is 2.5-4.0 g / L, and the dropwise adding amount of the NaOH solution is 5.0-10.0 mL.

5. A textile obtained by the method according to any one of claims 1-4.

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